Multi-Electron Processes in 4.15–11.08 keV/u¹³C⁶⁺ on Argon Collisions

The relative partial cross sections for ¹³C⁶⁺–Ar collisions at 4.15–11.08 keV/u incident energy are measured. The cross-section ratios σ^2E/σ^SC, σ^3E/σ^SC, σ^4E/σ^SC and σ^5E/σ^SC are approximately the constants of 0.51±0.05, 0.20±0.03, 0.06±0.03 and 0.02±0.01 in this region. The significance of the multi-electron process in highly charged ions (HCIs) with argon collisions is demonstrated (σ^ME/σ^SC as high as 0.79±0.06). In multi-electron processes, it is shown that transfer ionization is dominant while pure electron capture is weak and negligible. For all reaction channels, the cross-sections are independent of the incident energy in the present energy region, which is in agreement with the static characteristic of classic models, i.e. the molecular Coulomb over-the-barrier model (MCBM), the extended classical over-the-barrier model (ECBM) and the semiempirical scaling laws (SL). The result is compared with these classical models and with our previous work of ¹³C⁶⁺-Ne collisions [Chin. Phys. Lett. 23 (2006) 95].